**Core Concept**
The skeleton serves as a common site for metastasis in various cancers, with the frequency of metastasis varying among different bone locations. The distribution of metastatic lesions in the skeleton is influenced by the blood supply, bone marrow, and the mechanical stress exerted on different bones.

**Why the Correct Answer is Right**
The vertebral bodies are the most common site of metastasis in the skeleton due to their rich blood supply and the presence of red bone marrow. The vertebral bodies receive a dual blood supply from the anterior and posterior spinal arteries, making them more susceptible to metastatic spread. Additionally, the vertebral bodies have a high proportion of red bone marrow, which is involved in hematopoiesis and provides a fertile ground for metastatic cells to take hold. The mechanical stress exerted on the vertebral bodies also contributes to the high incidence of metastasis, as the repeated stress and strain can disrupt the normal bone architecture and facilitate the growth of metastatic lesions.

**Why Each Wrong Option is Incorrect**
**Option A:** Femur – While the femur is a common site for metastasis, it is not the most common site due to its less rich blood supply compared to the vertebral bodies.
**Option B:** Tibia – The tibia is less frequently involved in metastasis due to its smaller size and lower mechanical stress compared to the vertebral bodies.
**Option D:** Skull – The skull is a less common site for metastasis due to its dense bone structure and limited blood supply, making it less susceptible to metastatic spread.

**Clinical Pearl / High-Yield Fact**
The distribution of metastatic lesions in the skeleton can be remembered using the "PEPSI" mnemonic: Pelvis, Extremities, Proximal femur, Spine, and Skull. However, it is essential to note that the vertebral bodies are the most common site of metastasis, followed by the pelvis.

**✓ Correct Answer: C. Veebrae**